@TenPlus1: farming redo problems...^^at least i had a new world created without farming mod in 0.4.17.1 and there hay slabs and stair are ok.In the world i imported from 0.4.16 server(with farming-redo 1.36) these blocks became "unknown"items.I'll do another test with a new world in 0.4.17.1 with farming enabled

EDIT: ok, just read the farming thread, will update farming to 1.37 and stairs too

Phoenixflo44 wrote:What exactly do I need to do to update on Linux minetest?

I use Linux → Ubuntu → Mate

You don't say which version of Ubuntu you are running, but it must be 18.04 or older if you do not have Minetest 0.4.17.1; based on this. To get the current version you will need to add this PPA to your repository list. If you are familiar with Flatpacks, you can install from here.

dawgdoc wrote: it must be 18.04 or older if you do not have Minetest 0.4.17.1; based on this

This is inaccurate and unrelated. 18.04 is the latest long-term support release. *buntu repositories are always a few versions behind.

You told Phoenix to do what I suggested, add the PPA to get 0.4.17.1. You did give him the step by step, which I didn't. I did give an additional installation option in the event he prefers flatpacks. Inaccurate and unrelated - no, spoon feeding - no, more than the absolute minimum of information - guilty.

I know 18.04 is the latest LTS. As I said if Phoenix were on 18.10, Minetest would already be at the current stable version and he wouldn't be asking to upgrade. For him to have an older version of MT from the distro's official repositories Phoenix must be on Ubuntu 18.04, at the newest, which is at MT 0.4.16. Ubuntu 17.10 is also at 0.4.16 - I believe. If he were on an even older version of Ubuntu the MT version would be older still:

GD gave good instructions, that should have worked. In fact, that is how I installed the current version of MT on my laptop running LinuxMint 18.x (based on Xenial).

If you didn't do so, I would try again on the off chance there was a connection issue, or a problem with the Launchpad servers. The only thing I can tell from the error message would not be related to a wrong command. When I check the page for the ppa, and my sources list, it reads minetestdevs/stable/ubuntu instead of the minetestdevs/ubuntu/stable from your console. In fact it shows the same when I run apt update, but keep in mind I'm looking at a LM system and not getting the path from the same place you are.

Removing any installed packages of older versions should not change your local data in ~/.minetest. (Make a backup of it all as a precaution.) Once installed packages are removed, indicated by an i in the above output, then try installing the PPA with GD's instructions.

Based on your results, at a minimum, I would suggest removing (un-installing) minetest, minetest-data, and minetest-server before trying to enable the PPA that both I and GreenDiamond suggested. You should remove all three because the second and third are built into the PPA. If you don't remove all of them there would probably be interference when you add the PPA - likely the source of your error.

BUT, if I were you, I would un-install the three packages I already mentioned and all of the mods you installed from the Ubuntu repositories. It looks like you have 13 of them. THE REASON is that MT version 0.4.17.x had changes that broke older mods, as these are.

EDIT: Also, minetest-server is built into the PPA version, as is the data added with minetest-data.